Railway car truck



W. 20, 1945.. ca. E. DATH 2,38%,123

RAILWAY CAR TRUCK Filed April 28, 1944- Patented Nov. 20, 1945 RAILWAY CAR TRUCK George E. Dath, Mokena, Ill., assignor to W. H.

Miner, Inc., Chicago, 111., a corporation of Delaware Application April 28, 1944, Serial No. 533,153

3 Claims.

This invention relates to improvements in railway car trucks.

One object of the invention is to provide, in a railway car truck, simple and eificient means for snubbing the action of the truck springs, including spring actuated friction plates carried by the truck bolster slidably engaging vertically disposed friction surfaces on the inner sides of the vertically disposed sections which connect the top and bottom members of the truck side frame and form the usual guide means for the truck bolster.

Other objects of the invention will more clearly appear from the description and claims hereinafter following.

In the drawing forming a part of this specification, Figure 1 is a side elevational view of a portion of the truck side frame of a railway car, illustrating my improvements in connection therewith. Figure 2 is a horizontal sectional view, corresponding substantially to the line 2-2 of Figure 1.

In said drawing, l0 indicates one of the side frame members of a railway car truck. The side frame In, as shown, is in the form of a casting and has horizontally disposed top and bottom members H and [2 connected by spaced vertical sections l3|3 of channel-shaped cross section.

As will be understood by those skilled in this art, the truck includes two side frame members Ill-40, a truck bolster I4, and truck springs l5-l5 which are supported on the upper side of the bottom member [2. The opposite ends of the bolster M are guided between the vertical sections |3i3 and I3-l3 of the truck side frames. As clearly shown in Figure 1, the sections I3-l3 of each side frame are inwardly offset at the upper end portions thereof to provide guides I6|6 which cooperate with guide seats l1l'l at opposite sides of the bolster M. The truck springs are composed of two clusters and in the present disclosure compn'se four springs to each cluster, as indicated in the dotted lines in Figure 2. The springs at each side of the truck are supported on the bottom members |2--l2 of the truck side frames, the usual spring follower plates |8-|8 being disposed at the top and bottom of the spring cluster, the same respectively abutting thebolster and the bottom member 12. The springs |5l5 yieldingly support the bolster M which, in turn, supports the car body by means of the usual body bolster.

My improved snubbing means comprises a pair of friction plates A-A at each end of the bolster engaging the inner faces of the vertical sections l3l3 of the truck side frames at the bolster guides and having guide stems projecting through the vertical sections; compression springs B--B surrounding the stems of the friction plates; and follower discs C--C anchored to the guide stems and cooperating with the springs.

In carrying out my invention I provide the transverse, vertically extending wall of each vertical, channel-shaped section [3 of each truck side frame, which wall is indicated by I9, with a lengthwise extending, fiat friction surface 20 on the inner side thereof, that is, the side opposite to the side on which the bolster l 4 is guided.

The friction plates A-A are of rectangular shape and two such plates are associated with each side frame. Each friction plate has a cylindrical guide stem 2| formed integral therewith, projecting at right angles therefrom at the center of the plate. Each guide stem 2| is threaded at the free end, as indicated at 22. The stem 2| extends through a vertical slot 23 in the wall l9 and through an opening 24 in the outer side wall 25 of the bolster I 4.

The compression springs 3-3 are in the form of helical coils and serve to force the friction plates A-A against the friction surfaces 20 of the truck side frame. The spring B associated with each friction plate A surrounds the stem 2! thereof and has its opposite ends bearing on the inner side of the corresponding side wall 25 of the bolster and the follower disc C, which is shouldered against the nut 26 threaded on the outer end of the stem.

The springs 3-3 are under a predetermined compression and react against the side walls of the bolster to pull the friction plates tightly against the interior friction surfaces 20-20 of the vertical channel sections l3 l3 of the truck side frame, thereby providing the required resistance to vertical movement of the bolster to snub the action of the truck springs.

I have herein shown and described what I now consider the preferred manner of carrying out my invention, but the same is merely illustrative and I contemplate all changes and modifications that come within the scope of the claims appended hereto.

I claim:

1. In a railway car truck, the combination with a truck side frame having vertically disposed, laterally spaced guide walls; of a truck bolster having side walls, said bolster being interposed between said guide walls, with the side walls thereof in sliding engagement with the outer faces of said guide walls; truck springs supporting said bolster on the side frame; a friction plate in sliding engagement with each guide wall and bearing on the inner face thereof; a stem fixed to said plate and projecting therefrom into the bolster and extending through the corresponding guide wall and the side wall of the bolster; a follower anchored to the outer end of the stem; and a spring surrounding said stem and bearing at the opposite ends respectively onsaid follower and the inner side of said side wall of the bolster.

2. In a railway car truck, the combination with a truck side frame having vertically disposed, laterally spaced, guide walls provided with vertical guide slots therethrough; of a truck bolster having side walls provided with openings therethrough, said bolster being guided between said guide walls with the side Walls opposed to the outer sides of the guide walls; friction plates slidably engaged with the inner sides of said guide walls, each plate having a stem projecting therefrom and integral therewith; a follower anchored to the outer end of said stem, the stem of each plate extending through the guide opening of the guide wall at the corresponding side of the side frame and the opening in the corresponding bolster wall; and a spring reacting between the bolster and the follower plate of each stem to force the plate against the cooperating guide wall of the side frame.

3. In a railway car truck, the combination with a truck side frame having vertically disposed, laterally spaced guide walls; of a truck bolster having side walls, said bolster being guided between said guide walls with the side walls thereof slidably engaged with the outer sides of said guide walls; a friction plate carried by the bolster and movable therewith, said plate having a fixed stem extending through one of the side walls of the bolster and the corresponding guide wall of the side frame, said guide wall being vertically slotted to accommodate the stem for movement in vertical direction; a follower anchored to the stem; and a spring carried by the bolster and bearing on said follower to pull said plate against the inner surface of the guide wall.

GEORGE E. DATH. 

